Ok, I’m going to give this a go…this has been bothering me for years, but I cannot remember the name of this movie and I have not seen it anywhere since (since the early-mid 80’s when I originally saw it.)
Genre– Japanese creature-feature (think Godzilla). But, instead of a guy in a rubber lizard costume, the hero was a giant robot, and (if memory serves) he looked a lot like Twiki from Buck Rogers only way bigger. He would battle other creatures, and he would finish them off at the end of the duel by blasting them with missiles or bullets from his mechanized fingertips. I think he flies into space at the end of the movie and dies somehow.